It wasnt exactly inevitable persay but in many ways it was set into motion by the fact that the English were unwilling to compromise. The formation of the Continental Congress was supposed to bring forward the thoughts of the colonies to Parliament and the King. In there own statement of purpose they established that they were to gather complaints to present to the King. (Continental Congress 1774) Thomas Paine wrote in Common Sense which was one of the most widely read political pamphlets of the time "Our present condition, is, Legislation without law; wisdom without a plan; constitution without a name; and, what is strangely astonishing, perfect Independance contending for dependance." So he argues that the break as already happened and nothing can be done to reverse the process. States like Massachusetts and Virginia gave some of the most hardened supporters of the revolution and it only makes sense because after the Boston Massacre Massachusetts was faced with the most strict rule from the British, where Virginia was one of the wealthiest states and was denied the right to trade on their own. Also remember that the Second Continental Congress was in session from May 1775 meaning that it took more than a year to officially declare a break from England. This shows that the congress did not feel that it was inevitable but instead hoped for reconciliation. But as stated many writers and Patriots felt that it was impossible and it was only through a great amount of arguing that we eventually established George Washington as our Military leader and the Continental Army in a resolution made in June of 1774. The National archives have a great number of sources on these resolutions.